1 /* 2 * Copyright (C) 2016 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef _SIMPLE_Q_H_ 18 #define _SIMPLE_Q_H_ 19 20 21 #include <stdbool.h> 22 #include <stdint.h> 23 24 25 #define SIMPLE_QUEUE_MAX_ELEMENTS 0x0FFFFFFE 26 27 typedef bool (*SimpleQueueForciblyDiscardCbkF)(void *data, bool onDelete); //return false to reject 28 29 //SINGLE producer, SINGLE consumer queue. data is copied INTO/OUT of the queue by simpleQueueEnqueue/simpleQueueDequeue 30 31 struct SimpleQueue* simpleQueueAlloc(uint32_t numEntries, uint32_t entrySz, SimpleQueueForciblyDiscardCbkF forceDiscardCbk); 32 void simpleQueueDestroy(struct SimpleQueue* sq); //will call discard, but in no particular order! 33 bool simpleQueueEnqueue(struct SimpleQueue* sq, const void *data, int length, bool possiblyDiscardable); 34 bool simpleQueueDequeue(struct SimpleQueue* sq, void *dataVal); 35 36 37 #endif 38 39